the search this evening across several states for the driver authorities believe opened fire on another driver this weekend. It was deadly. And the victim had called 911 just moments before. Here's abc's susan saulny. Reporter: Tonight, a massive search across pennsylvania, maryland and west virginia to find the driver of a dark-colored pickup truck who authorities say fatally shot 28-year-old timothy davison in what appears to be a terrifying incident of road rage. It began along a stretch of i-81 near the border between maryland and pennsylvania just after 2:00 a.M. On saturday. Davison was driving north, back home to poland, maine, after visiting family over the holidays. He called 911 in distress, saying a ford ranger-style truck was following him. What happened next is chilling. Operators listened as davison, helpless at the wheel, said someone in the truck was firing shots. He then rammed his vehicle into the victim's vehicle causing it to spin out of control and become disabled in the median. Reporter: Police say the suspect got out of his truck, approached davison and fired several rounds into his vehicle. Davison, a pipefitter at an engineering company, died of his injuries. His father telling abc news tonight that he was a hard wo who disliked guns. He was on 911 for the majority of this incident, so, we are reviewing the tapes right now and hoping we can get some more information that might help us find out what happened. Reporter: Tonight, police want to know if this shooting has any connection to a suspected road rage shooting just two days ago and 60 miles away. In that case, the driver shot at close range, escaped unharmed. David? Susan, thank you.

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